Li, Yiyuan
Cui, Chunxiao
Zhang, Ruhong http://orcid.org/0000-0001-8124-0257
Zhang, Qun
Xu, Zhicheng
Xu, Feng
Li, Datao
Article History
Received: 9 December 2017
Accepted: 28 January 2018
First Online: 22 February 2018
Compliance with Ethical Standards
:
: Authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.